president obama leads his republican rival by just 1%. and we'll have much more on last night's debate throughout the morning. nbc news senior political editor mark murray will join us live later this morning to break down what the candidates needed to accomplish and whether they were successful. >> let's go to melissa live at the news4 news desk. >> we've just learned first lady michelle obama will travel to loudoun county this coming tuesday, october 9th for a campaign event. as soon as we get additional information on her visit, we'll pass that along. this highlights the importance of northern virginia in the race for the presidency. tomorrow, president obama will make a trip to fairfax county. he'll be speaking at george mason university. >>> right now, separate searches for missing teens, one in maryland. montgomery county police looking for this young man, 15-year-old derionte hebron, last seen at the wheaton community center monday around 2:00 in the afternoon. he's 5'8", about 110 pounds. his family says he likes to spend time at